package com.example.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.common.BaseContext;
import com.example.reggie.common.CustomException;
import com.example.reggie.common.R;
import com.example.reggie.entity.*;
import com.example.reggie.mapper.OrderMapper;
import com.example.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 老肥！！！
 * @Date: 2022/11/19/20:16
 * @Description: 不想学代码了！！！
 */

@Service
@Slf4j
public class OrdersServiceImpl extends ServiceImpl<OrderMapper,Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private UserService userService;
    @Autowired
    private OrderDetailService orderDetailService;
    //    用户下单
    @Override
    @Transactional//事务控制
    public void submit(Orders orders) {
//        获得当前用户id
        Long id = BaseContext.getCurrentID();
//        查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,id);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        if(list == null || list.size() == 0){
            throw new CustomException("用户购物车为空，无法下单");
        }
//        查询用户数据
        User user = userService.getById(id);
//        查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw  new CustomException("用户地址为空，无法下单");
        }
        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);//原子操作
        List<OrderDetail> orderDetails = list.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(id);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
//        向订单明细表插入数据,多条数据
        orderDetailService.saveBatch(orderDetails);
//        清空购物车
        shoppingCartService.remove(queryWrapper);
    }

}
